通过自由运转和滚动接触疲劳试验评估用于深沟球轴承应用的聚四氟乙烯复合材料。

Assessment of polytetrafluoroethylene composites for deep groove ball bearing applications through free run and rolling contact fatigue tests.

作者信息

Deshwal Dhruv, Belgamwar Sachin U, Bekinal Siddappa I

机构信息

Department of Mechanical Engineering, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan, 333031, India.

Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.

出版信息

Sci Rep. 2025 Mar 24;15(1):10088. doi: 10.1038/s41598-025-94547-4.

DOI:10.1038/s41598-025-94547-4

PMID:40128327

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11933675/

Abstract

Polytetrafluoroethylene (PTFE) is widely used in tribological applications. However, its usage in the ball-bearing application has not been explored. The present study investigates the usage of PTFE composites for deep groove ball (DGB) bearings. Initially, a ball-on-disc experiment is conducted to analyze the interaction between pure PTFE, 40% bronze-filled, 25% glass fiber-filled PTFE composites, and SiN balls by determining the coefficient of friction (COF) and specific wear rate. Then, the reliability of the fabricated DGB is checked through free run and rolling contact fatigue (RCF) tests using a 6-channel DAQ system (OR35-INST). In the free run test, a rotor supported on fabricated polymer bearing sets is rotated up to two million cycles under minimal load conditions. Its vibrational signals and RPM are continuously monitored through an accelerometer and tachometer. After a subsequent number of cycles, the dynamic characteristics of the shaft are recorded using the DAQ system and eddy probes. Finally, an RCF test is conducted to check the load-bearing capacity of the bearing. The bearing is subjected to a 36 N to 108 N (in step of 36 N) load, and the vibration signals are recorded.

摘要

聚四氟乙烯（PTFE）广泛应用于摩擦学领域。然而，其在滚珠轴承应用中的使用尚未得到探索。本研究调查了聚四氟乙烯复合材料在深沟球（DGB）轴承中的使用情况。首先，通过测定摩擦系数（COF）和比磨损率，进行了球盘试验，以分析纯聚四氟乙烯、40%青铜填充、25%玻璃纤维填充的聚四氟乙烯复合材料与氮化硅球之间的相互作用。然后，使用6通道数据采集系统（OR35-INST）通过自由运行和滚动接触疲劳（RCF）试验检查所制造的深沟球轴承的可靠性。在自由运行试验中，支撑在制造的聚合物轴承组上的转子在最小负载条件下旋转多达两百万次循环。通过加速度计和转速计连续监测其振动信号和转速。在随后的若干循环后，使用数据采集系统和涡流探头记录轴的动态特性。最后，进行滚动接触疲劳试验以检查轴承的承载能力。轴承承受36 N至108 N（以36 N为步长）的负载，并记录振动信号。